Scraper



L. P. GREEN.

I SCRAPER.

APPLICATION FILED SEPT. 28, I920.

Patented Dec. 6, 1921.

, 1720672237? .esZa 'e Z? 6736 UNITED s'rAi s i enr OFFICE.

LESLIE P. GREEN, OF CHICAGO, ILLINOIS.

SCRAPER.

Application filed September 28, 1920. Serial No.

To all whom it may concern:

lie it known that I. LESLIE P. GREEN, a citizen of the United States. and a resident of (liicago, in the county of Cook, State of Illinois, have invented certain new and useful Improvements in Scrapers. of which the following is a specification.

My invention relates to scrapers of that class which are used for scraping up gravel. soil or other material. loading it on cars or wagons. etc.

Scrapers of the above class referred to are connected at their front ends to a cable to be dragged along the ground to scoop up and convey material to a discharge point from which the accumulated material can drop into a car. wagon or other vehicle. A cable is also connected with the rear end 'of the scraper to return it to the field of operation. Among the important objects of my invention are: to provide drags or rudders at the apex or rear end of the scraper for enabling the scraper to dig in and get a firm hold in the ground at the beginning of a scraping operation and also for thereafter guiding the scraper and preventing swinging thereof; to provide keel members or sections at the front end of a scraper for guiding and steering the scraper and assisting the rudders in keeping the scraper to a straight path and preventing sway thereof; to provide for such formation. angularity and extent of the upper and lower side wall sections of the scraper in accordance with the nature of the material to be operated upon; and in general to improve upon the construction and adjustment of scrapers of the class referred to that they may be used with greater accuracy. certainty and efficiency.

My various improvements are shown incorporated in a structure illustrated on the accompanying sheet of drawing in which Figure l is a plan view of a scraper,

Fig. 2 is a plan view showing a somewhat modified construction,

Fig. 3 is a side elevational view of the structure of Fig. 1.

Fig. 4 is a similar side elevational view showing additional parts.

Fig. 5 is a sectional view Fig. 1.

Fig. (3 is a transverse sectional view showing one design of formation. angle and extent of the scraper walls and the manner of operation when the scraper is used in soft earth and on plane 55,

Specification of Letters Patent.

Patented Dec. 6, 1921. 413,455.

Fig. 7 is a view similar to Fig. 6 showing the arrangement where the scraper is used in hard earth.

The scraper shown is V-shape, comprising the similar halves A and I5 secured together at the apex end by suitable corner plates 10 by riveting. bolting. or otherwise. At the apex end is also secured a fitting which the return cable 12 may be conveniently secured. Each of the halves A and B is preferably formed from a single plate of sheet metal properly bent and cut to form. Fig. 5 indicates the particular form of the side members of Fig. 1. The metal blank is bent longitudinally to form the vertical side section 13. the top horizontal section H and the lower inwardly inclined section 1."). At their front ends the halves A and ll are provided with suitable holes in for receiving the cable legs 17 which in practice connect with the main cable for drawing the scraper to its dumping destination. The scraper is drawn to the startin point by the cable 12 and then'by means of the other cable the scraper is dragged forwardly. In order to cause the scraper to immediately take hold of the ground so as to avoid lost power, and also to guide the scraper. I provide rudders or drags 18 on the side members near the trailing or apex end thereof. such rudders being secured to the lower slanting section 15 and inclined forwardly as shown in Fig. 3 and are sharpened so that as soon as pull is applied to the scraper. its weight will cause the rudders to dig into the ground thereby more powerfully drawing the lower edges of the wall section 15 against and into the ground. The members 18 also act to prevent swaying laterally of the scraper during forward travel thereof and tend to keep the scraper in a direct path to the unloading destination.

Fnder some conditions it is difficult to keep the scraper in a straight path and I have therefore provided means in the form of keel sections. Preferably. I bend and form the scraper halves A and B at their front ends to provide flat vertical sections 19 which act as keels. these sections being parallel. After the scraper gets into the surface a distance. these keel sections act more or less-like the keels on boats and prevent lateral rocking or swaying as the scraper is dragged along. IInder some conditions. these keel members will be sutlicient to guide the scraper, and under other conditions, the

rudders 18 might be sufficient, while at other times, both the rudders and the keels are necessary for maintaining the proper travel of the'scraper. The keels may be of more or less extent as the conditions require. In the structure of Fig. 2, they are shown considerably extended in order to give a comparatively large keel surface, and to keep them in proper parallelism, a brace 20 is provided connected with the top thereof. The structure of Fig. 2 also shows the top plate 21 secured to the scraper near the apex thereof for strengthening it against spreading under heavy strain.

By connecting the cable 17 with the holes 18 adjustment can be made for the'desired degree of digging in of the sc 'aper at its front end. If the attachment is near the top.

then the digging in effort will be greater, while if the attachment is down low. the scraper may be lifted slightly at its front end during travel. The particular adjust ment depends of course upon the nature of the soil and other conditions. For some class of work it may be desirable to add scarifiers or teeth 22 as shown in Fig. 4 for breaking up the surface, particularly where the soil is hard or rocky.

After a scraper has been dragged a distance. it becomes filled and the accumulated material presses upwardly against the upper wall section 14 and the scraper then practically rides on its load and does no further digging until it is dumped. The angle and extent of the top section and also the angle and extent of the lower section 15 can be varied to suit conditions. For working in soft earth, it may be desirable to have the upper section 1i deflected upwardly and comparatively long. and the lower section 15 comparatively short as illustrated in Fig. 6. Where the ground is hard. it might be desirable to have the upper section inclined and shorter and the lower section 15 longer as illustrated in Fig. 7.

I thus produce a scraper which is of simple but substantial construction. which digs in and takes hold of the ground without loss of time. and'which is entirely self guiding and can therefore be efficiently controlled and operated. Modifications other than those herein shown are of course possible, without departing from the scope of my invention.

I claim as follows:

1. A scraper comprising sides secured together at one end and diverging forwardly, and guiding and digging extensions extending downwardly from said sides forward of the juncture between them, substantially as described.

2. A scraper comprising sides secured together at one end and diverging forwardly, the inwardly, and forwardly extending vertical parallel keel sections at the front endsof said sides for guiding the scraper during travel thereof, said keel sections. at their extreme forward ends. extending vertically the full depth of said sides, substantially as described.

3. In a scraper of the class described, the combination of the two sides secured together at one end and extending divergihgly, guiding and dragging extensions extending downwardly from said sides at the juncture end thereof, and vertical parallel sections at the front end of said sides forming heels for guiding said scraper during travel.

4. In a scraper of the class described. the combination of the side members secured together at one end and extending divergingly. each side member having a vertical wall section and an inwardly deflected top section and a lower inwardly inclined bottom section. said side members at their front ends being flat vertically to form parallel keel sections for guiding the scraper during travel thereof.

5. In a scraper of the class described. the combination of the side members secured together at one end and extending divergingly. each side member having a vertical wall section and an inwardly deflected top section and a lower inwardly inclined bottom section, said side members at their front ends being fiat vertically to form parallel ke'el sections for guiding the scraper during travel thereof, and rudder members on said side members near their juncture ends for assisting the keel sections in guiding the scraper.

In witness whereof, I hereunto subscribe my name this 24th day of September A. 1).. I920.

LESLIE P. GREEN lower portions of said sides extending- 

